Reagent holder



FIG. 1 is a top-front-right perspective view of a reagent holder, showing my design;

FIG. 2 is a top-rear-right perspective view thereof;

FIG. 3 is a top-right perspective view thereof;

FIG. 4 is a top-left perspective view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a top-front perspective view thereof. 

CLAIM The ornamental design for a reagent holder, as shown and described. 